التفاصيل البيبلوغرافية
| العنوان: |
Investigation of cable influence on the interturn transient voltage distribution in rotating machine windings using a three-phase model. |
| المؤلفون: |
Ferreira, RS1 (AUTHOR) rodrigo.sousa@ufrj.br, Ferreira, AC1 (AUTHOR) ferreira@ufrj.br |
| المصدر: |
Electric Power Systems Research. Jul2021, Vol. 196, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*MULTICONDUCTOR transmission lines, *WINDING machines, *TRANSMISSION line theory, *CABLES, *ELECTRIC circuits, *FINITE element method, *ROTATING machinery |
| مستخلص: |
• The simulations show that the cable length affect both, turn-to-turn and turn-to-ground results, however the variations for turn-to-turn results are higher. • Fort shorter cables, the influence of the cable length is seen only in the first line-end coils for the phase which the surge has been applied to, nevertheless, for longer cables the amplitude is changed for all turns from the three phases. • For longer cables the turn-to-turn voltages are lower due to the reduction of the rise time by the cable, which suggests that lower surge capacitors could be used. Turn-to-turn and turn-to-ground transient voltages due to the surges which arrive at rotating machine terminals shall be known as exactly as possible to optimize the insulation design. Normally these overvoltages are obtained by Multiconductor Transmission Line Theory using only part of one phase of the stator winding by applying a surge at the line-end coil. Moreover, many works consider the feeding cable to analyze only the voltage at machine terminals by using a simple model for the motor. This paper analyses the influence of the cable length on the transient voltage distribution inside the machine by numerical simulations using a three-phase model for the machine windings. The results are obtained by a cable-motor model using Finite Elements Method (FEM). The model couples the transient magnetic fields solved in a 2D geometry with electric circuit elements. Results show that the cable length has influence on the transient voltage distribution, especially for the line-end coils from the phase where the surge has been applied to. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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